Rest API Post Json 使用带有两个参数的 C#

Question

我需要在 REST api 上执行 Post 请求，该 api 接受 JSON 数据类型。我要包含两个参数，startdate 和 enddate。 C#中的任何指南？我收到错误（415）不支持的媒体类型。我相信这是因为我的帖子请求没有正确的 json 正文

        var request = WebRequest.Create(url) as HttpWebRequest;
        request.Method = "POST";
        request.Headers.Add(HttpRequestHeader.Authorization, "Bearer xxx");  
        request.ContentType = "application/json; charset=utf-8";

        // Get response here
        var response = request.GetResponse() as HttpWebResponse;
      
        if (response.StatusCode == HttpStatusCode.OK)
        {
            Console.WriteLine(response.ToString());
            Console.ReadKey();
            // ....
        }

Answer 1

这是我如何设置标题的示例。

using Newtonsoft.Json;

// e.g. update a user's email address via REST POST
dynamic user = new JObject();
user.Email = "testuser@test.com";
var json = user.ToString();

// json is then
// {"Email":"testuser@test.com"}
// and the json is POSTed to the appropriate REST url

var client = new HttpClient
{
    Timeout = TimeSpan.FromSeconds(10)
};
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Add("User-Agent", "user agent name");

var request = GetRequestMessage(uri, accessToken, json);
var response = await client.SendAsync(request);
var content = await response.Content.ReadAsStringAsync();

private HttpRequestMessage GetRequestMessage(string uri, string accessToken, string jsonPayload)
{
    var httpRequestMessage = new HttpRequestMessage(HttpMethod.Post, uri)
    {
        Headers = { { "Authorization", $"Bearer {accessToken}" } }
    };

    httpRequestMessage.Content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

    return httpRequestMessage;
}